Multilayer secondary battery and method of making same
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United States of America Patent
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Jul 19, 2011
Grant Date -
Aug 3, 2006
app pub date -
Jan 26, 2006
filing date -
Jan 28, 2005
priority date (Note) -
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Abstract
A multilayer secondary battery including a positive electrode having an active substance layer formed on a flat sheet-form collector and a negative electrode having an active substance layer formed on a flat sheet-form collector stacked together in opposite relation via a separator. The positive electrode active substance layer differs in area from the negative electrode active substance layer. Active substance-free portions with no active substance layer coated thereon are formed on sides of the outer periphery of a collector of the electrode having the smaller active substance layer. The surface of the collectors at the active substance-free portions is covered with an insulating layer. The end face of the insulating layer facing away from a side contiguous to an active substance layer and the end face of the electrode having a larger active substance layer area are stacked together on the same plane that intersects vertically an electrode plane.
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